La glándula tiroides está presente en todos los vertebrados y es única entre las glándulas endocrinas en que almacena sus productos de secreción (hormonas tiroidales) extracelularmente. Estas hormonas juegan un papel indispensable en una variedad de reacciones bioquímicas en tejidos periféricos c...
The thyroid gland is present in all vertebrates and it is unique among endocrine glands in that it stores its secretory products (the thyroid hormones) extracellularly. These hormones play an indispensable role in a variety of biochemical reactions at the level of peripheral tissues such as the s...
Con el objeto de determinar la actividad sanguínea de glutatión peroxidasa (GSH-Px; E.C. 1.11.1.9) en bovinos lecheros de la IX Región de la Araucanía (38º LS y 71º LO), Chile, y establecer su eventual asociación con el contenido de Se en el forraje, durante el otoño y la primavera de 1999 se tom...
The content of selenium (Se) in forage samples and the blood activity of glutathione peroxidase (GSH-Px; EC 1.11.1.9) of groups of lactating cows and heifers were evaluated between autumn and spring of 1999 in 12 dairy herds from IXth Region (38º S and 71º W) of Chile. Se-concentration was determ...
Wittwer, F.
,
Araneda, P.
,
Ceballos, A.
,
Contreras, P.A.
,
Andaur Rademacher, Marcela
,
Bohmwald, H.
,
[Actividad de glutation peroxidasa (GSH-Px) en sangre de bovinos a pastoreo de la IX Región, Chile y su relación con la concentración de selenio en el forraje]
,
[Glutathion peroxidase activity (GSH-Px) in grazing dairy cattle in the south of Chile (IXth Region) and their relation with selenium contents in the forage]
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Glutathion peroxidase activity (GSH-Px) in grazing dairy cattle in the south of Chile (IXth Region) and their relation with selenium contents in the forage
El objetivo de este trabajo fue presentar los primeros resultados exitosos de vitrificación de blastocistos bovinos producidos in vitro utilizando la técnica del Open Pulled Straw (OPS) en nuestro país. Para la confección de las OPS, pajuelas plásticas de 0.25 ml fueron estiradas utilizando calor...
The purpose of this work is to present preliminary produced in vitro using the Open Pulled Straw (OPS) method. Open Pulled Straws were made by pulling 0.25 ml inner and outer diameter were reduced to half of their original and deposited individually in vitrification solutions 1 and dimethyl - sul...
Neospora caninum is a recently recognised parasite that produces infection in dogs and herbivorous. In cows, the disease does not produce clinical signs of illness, instead it produces losses. Chile has a large dairy industry and pregnancy losses in that system seem to be economically important. ...
Los abortos bovinos causan importantes pérdidas económicas a la ganadería mundial. Una parte importante de ellos permanecen aún con etiología desconocida, y de los diagnosticados, la mayoría corresponden a causas infecciosas. Dentro de ellos los abortos ocasionados por protozoos han tomado releva...
Patitucci, A.N.
,
Pérez, M.J.
,
Lüders Post, Carlos
,
Ratto Fuster, Marcelo
,
Dumont, A.G.
,
[Evidencia serológica de infección por Neospora caninum en rebaños lecheros del Sur de Chile]
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[Serologic evidence of Neospora infection in dairy cattle in Chile]
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Serologic evidence of Neospora infection in dairy cattle in Chile
Se comparó el desarrollo in vitro de ovocitos obtenidos de ovarios de vaca de matadero, madurados, fecundados y cultivados in vitro bajo dos sistemas. Los ovocitos fueron cultivados en un medio de maduración a 39 °C, 5 % de CO2 y humedad relativa de 95 % durante 22 horas. Posteriormente, fuer...
The in vitro development of matured and fertilized bovine oocytes was compared between two culture systems. Oocytes were collected by aspiration of follicles of 3-8 mm in diameter using an 18g needle. After morphological selection the oocytes were incubated at 39 0C, 5 % C02 y 95 % relative humid...
Ratto Fuster, Marcelo
,
Berland Olea, Marco
,
Wolter, M.
,
Matamoros, Roberto
,
[Desarrollo de embriones de bovino obtenidos por fecundación in vitro cultivados con células oviductales o medio condicionado y transferidos a hembras receptoras]
,
[Bovine embryo development produced by in vitro fertilization cultured with oviductal cell or conditioned medium and transfer to recipients]
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Bovine embryo development produced by in vitro fertilization cultured with oviductal cell or conditioned medium and transfer to recipients
Enzymatic extracts were prepared from rumen fluid (RF) either directly after collection or after incubation in enriched media and their proteolytic activities were measured and compared. The objective of RF in vitro cultivation was to augment enzymatic activity by using diverse incubation media c...
Velásquez, A.
,
Pichard, Gastón
,
[Effects of rumen fluid pre-incubation on in vitro proteolytic activity of enzymatic extracts from rumen microorganisms]
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Effects of rumen fluid pre-incubation on in vitro proteolytic activity of enzymatic extracts from rumen microorganisms
La neosporosis ha sido reconocida y descrita como causa de aborto en la mayoría de las áreas ganaderas del mundo. En Chile se demostró la presencia de la enfermedad, sin embargo, muchos aspectos son desconocidos, razón por la cual se estudió la prevalencia de infección medida a través de anticuer...
Neosporosis is an important cause of economic loss in the cattle industry throughout the world. In Chile, it has been recently detected and,. since then, veterinarians and producers have required information about different aspects of the disease. In this paper we present data of the prevalence o...
The aim of this study was to evaluate the effect of a low Selenium diet and its supplementation on the serum levels of T3, T4 and on the lipid profile in dairy cows under an induced oxidative stress. Twelve pregnant dairy Chilean-Friesian cows were selected and assigned to one of two groups, cont...
El objetivo de este estudio fue evaluar el efecto de un bajo consumo de Se y su suplementación sobre la concentración sérica de T3 y T4 y sobre el perfil lipídico en vacas lactantes bajo estrés oxidativo inducido. Fueron seleccionadas 12 vacas Frisón Negro gestantes, asignadas auno de dos grupos ...
El objetivo de este estudio fue evaluar la concentración de selenio (Se) en muestras de leche procedentes de rebaños lecheros del sur de Chile y sus eventuales variaciones estacionales, y complementariamente examinar la eventual relación entre dicha concentración con algunos indicadores de produc...
An observational study was conducted in 59 Chilean dairy farms to evaluate bulk tank milk selenium (Se) concentration, and its association with measures of milk production parameters and udder health, measured as bulk tank somatic cell count. Fifty-nine dairy herds from Southern Chile were select...
El contenido de yodo (I) en la ración es un factor relacionado con la concentración sanguínea de tiroxina (T4) y triyodotironina (T3). En vacas lecheras a pastoreo en el sur de Chile, se han observado concentraciones bajas de T4. El objetivo de este estudio fue obtener información acerca de la co...
Iodine (I) content of rations is a factor associated with the blood concentration of thyroxine (T4) and triiodothyronine (T3) in cattle. In herds from southern Chile, low blood concentrations of T4 in grazing dairy cows have been reported. The objective was to obtain information about the I conte...